04-07-2013, 09:08 PM
As Codefox said, a piece of clear plastic used as document protectors works well as a substitute for old, worn/broken/missing mica. I have used that on Philco 70 and 90 trimmers with no problems. Just cut the plastic to fit, make a hole just large enough for the screw to pass through, reassemble, align and done.
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Ron Ramirez
Ferdinand IN